2006062007590200FALSE20060710161426002009050512291600{268EE0A2-EA53-4BBB-B789-D6E9EED96DE6}UnknownThis is Category I data. Category I data are public domain and available to share with Caltrans partners.This is Category I data. Category I data are public domain and available to share with Caltrans partners.mailing and physical address
1120 N St., MS 38
SacramentoCA95814USACaltrans TSI/GIS Data Branch(916) 654-5037(916) 654-6583nonecensusblockboundariesCAnoneCaliforniaMicrosoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 9.1.0.722enThe 'CENSUSTRACTS' layer contains 1990 Census tract boundaries that have been clipped by the county outline. In most cases this clipping renders a recognizable county outline, but in areas where the legal county line is offshore (San Francisco, San Mateo, Alameda, Contra Costa) the tracts will extend beyond the shoreline to the legal county line and will appear unusual. The source for this layer is the 1990 TIGER/Line files. The attribute file contains the PL94-171 data (all fields) for the census tracts, and two density items.The purpose of the feature class is to display updated (for the publication date) census tract boundaries by countyCaltrans TSI/GIS Data Branch19921104centrctcentrctvector digital datahttp://www.dot.ca.gov/hq/tsip/gis/datalibrary/gisdatalibrary.htmlground condition19901231-122.373545-121.46875837.90575237.454378-122.373545-121.46875837.45437837.905752ShapefileCaltrans TSI/GIS Data BranchMetadata Coordinatormailing and physical addressSacramentoCA95814
1120 N St., MS 38
USA(916) 654-5037(916) 654-6583enFGDC Content Standards for Digital Geospatial MetadataFGDC-STD-001-1998local time20090505http://www.esri.com/metadata/esriprof80.htmlESRI Metadata ProfileCaltrans TSI/GIS Data Branchmailing and physical address
1120 N St., MS 38
SacramentoCA95814USA(916) 654-5037(916) 654-6583This is Category I data. Category I data are public domain and available to share with Caltrans partners.Downloadable Data0.2900.290census 1990TIGER, US Bureau of the Census19901231Unknowndigital tape media19901231ground conditionUS Bureau of the CensusTIGER 1990 Census data/line filesDataset copied.centrct20060614Where TIGER is based on DLG, the accuracy is good; however, where it calls for GBF/DIME, the accuracy is poor. The layer is rich in attributes. In addition to census tract identification, there is 1990 PL94-171 data (all fields). The attribute accuracy is very good overall. The feature class were checked against Census Bureau maps for tract number accuracy.The TIGER/Line data was re-issued several times. Early versions had corrections to the line work, some of which had to do with county boundaries. The post-census county lines do not match the Teale library's county lines. There are instances where the original TIGER census tract feature class contain polygons which were clipped out by the tile insertion process. In order to include these valid census polygons in the library, they are represented by very small square polygons (55 meters on a side) near the county line where they were clipped out. They are correctly coded with census tract numbers, but the area values are necessarily bogus. Most of these polygons were originally very small and had no data attached. All of them have numeric values in the 80s and 90s in the last 2 digits of the CTBNA90 item (e.g. 4100.98). Where these contain non-zero PL94-171 data, users are cautioned not to use the 'pdensity' and 'hdensity' attributes, which are incorrect due to the erroneous area values.
The centract layer, based on TIGER data, is complete with regard to features. here are instances where the original TIGER census tract feature class contain polygons which were clipped out by the tile insertion process. In order to include these valid census polygons in the library, they are represented by very small square polygons (55 meters on a side) near the county line where they were clipped out. They are correctly coded with census tract numbers, but the area values are necessarily bogus. Most of these polygons were originally very small and had no data attached. All of them have numeric values in the 80s and 90s in the last 2 digits of the CTBNA90 item (e.g. 4100.98). Where these contain non-zero PL94-171 data, users are cautioned not to use the 'pdensity' and 'hdensity' attributes, which are incorrect due to the erroneous area values.Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 9.1.0.722centrct-122.373545-121.46875837.90575237.4543781-122.373545-121.46875837.90575237.4543781ISO 19115 Geographic Information - MetadataDIS_ESRI1.0dataset002file://\\svhqs02\newgis\data\shapes\geo83\counties\ala\centrct.shpLocal Area Network0.290ShapefileVectorSimplePolygonFALSE314FALSEFALSEG-polygon314GCS_North_American_1983Decimal degrees0.0000000.000000North American Datum of 1983Geodetic Reference System 806378137.000000298.257222GCS_North_American_1983314HOUSINGHOUSINGNumber11Total number of housing units in the census block.US Bureau of the CensusPDENSITYPDENSITYFloat1311Persons per square mile.US Bureau of the CensusHDENSITYHDENSITYNumber195Housing units per square mile.US Bureau of the CensusX_COORDX_COORDNumber195x value for longitudeUS Bureau of the CensuscentrctFeature Class3141990 census block dataUS Bureau of the CensusFIDFIDNumber10Internal feature number.ESRISequential unique whole numbers that are automatically generated.ShapeShapeNumber10Feature geometry.ESRICoordinates defining the features.AREAAREAString3Area of featureCaltrans TSI/GIS Data BranchPERIMETERPERIMETERNumber6Perimeter of featureCaltrans TSI/GIS Data BranchPERSONSPERSONSNumber10Total number of persons in the census block.US Bureau of the CensusRACE_WHTRACE_WHTNumber10Total number of whites in the census block.US Bureau of the CensusRACE_BLKRACE_BLKNumber10Total number of blacks in the census block.US Bureau of the CensusRACE_INDRACE_INDNumber10Total number of American Indians in the census blockUS Bureau of the CensusRACE_ASIRACE_ASINumber10Total number of Asians in the census block.US Bureau of the CensusRACE_OTHRACE_OTHNumber10Total number of persons of other races in census block.US Bureau of the CensusRA18_WHTRA18_WHTNumber10Total number of whites over age 18 in census block.US Bureau of the CensusRA18_BLKRA18_BLKNumber10Total number of blacks over age 18 in census block.US Bureau of the CensusRA18_INDRA18_INDNumber10Total number of American Indians over age 18 in census block.US Bureau of the CensusRA18_ASIRA18_ASINumber10Total number of Asians and Pacific Islanders over age 18 in the census block.US Bureau of the CensusRA18_OTHRA18_OTHNumber10Total number of persons over age 18 of other races in the census block.US Bureau of the CensusHISO_HISHISO_HISNumber10Total number of persons of Hispanic origin in the census block.US Bureau of the CensusHISO_WHTHISO_WHTNumber10Total number of non-Hispanic whites in the census block.US Bureau of the CensusHISO_BLKHISO_BLKNumber10Total number of non-Hispanic blacks in the census block.US Bureau of the CensusHISO_INDHISO_INDNumber10Total number of non-Hispanic American Indians in the census block.US Bureau of the CensusHISO_ASIHISO_ASINumber10Total number of non-Hispanic Asians in the census block.US Bureau of the CensusHISO_OTHHISO_OTHNumber10Total number of persons of non-Hispanic origins of other races in the census block.US Bureau of the CensusHI18_HISHI18_HISNumber10Total number of persons of Hispanic origin over age 18 in the census block.US Bureau of the CensusHI18_WHTHI18_WHTNumber10Total number of non-Hispanic whites over age 18 in the census block.US Bureau of the CensusHI18_BLKHI18_BLKNumber10Total number of non-Hispanic blacks over age 18 in the census blockUS Bureau of the CensusHI18_INDHI18_INDNumber10Total number of non-Hispanic American Indians over age 18 in the census block.US Bureau of the CensusHI18_ASIHI18_ASINumber10Total number of non-Hispanic Asians over age 18 in the census block.US Bureau of the CensusHI18_OTHHI18_OTHNumber10Total number of persons of non-hispanic origins of other races over age 18 in the census block.US Bureau of the CensusY_COORDY_COORDNumber10y value for latitudeUS Bureau of the CensusCENTRCTA_CENTRCTA_Number9IdentifierCaltrans TSI/GIS Data BranchCENTRCTA_ICENTRCTA_INumber9IdentifierCaltrans TSI/GIS Data BranchFIPSCOFIPSCONumber195FIPS county ID numberUS Bureau of the CensusCTBNA90CTBNA90Number195US Bureau of the CensusCensus tract number. Two places after the decimal are implied.S1ALINKS1ALINKNumber10US Bureau of the CensusNumber used to effect a link relate to census data tables.SDASDAString9US Bureau of the CensusNumber used for supply/demand/allocation model that allocates new housing units to areal units, such as Census blocksLOGRECNU_SLOGRECNU_SNumber10US Bureau of the CensusRelate item for STF1B data files. Bureau of Census logical record number. STF1B data is in /callib/stf/blockdata.BELOWHSBELOWHSNumber133US Bureau of the CensusTotal number of persons below the High School Education LevelHS_HS_Number133US Bureau of the CensusTotal number of persons at or above the High School education levelPCTBELOWHSPCTBELOWHSNumber122US Bureau of the CensusPercent of persons below the high school educationPCTHS_PCTHS_Number122US Bureau of the CensusPercent of persons at or above the high school education levelBELOWPOVBELOWPOVNumber133US Bureau of the CensusTotal number of persons below poverty levelABOVEPOVABOVEPOVNumber133US Bureau of the CensusTotal number of persons above the poverty levelPCTBELOWPOPCTBELOWPONumber122US Bureau of the CensusPercent of persons below the poverty levelPCTABOVEPOPCTABOVEPONumber122US Bureau of the CensusPercent of persons above the poverty level20090505